import { Observable } from 'rxjs';
export declare type MonoOp<I, O> = (i: I) => O;
export declare type Op<I1, I2, O> = (i1: I1, i2: I2) => O;
export declare type TriOp<I1, I2, I3, O> = (i1: I1, i2: I2, i3: I3) => O;
export declare type QuadOp<I1, I2, I3, I4, O> = (i1: I1, i2: I2, i3: I3, i4: I4) => O;
export declare type Func<I, O> = (...i: I[]) => O;
export declare type $<T> = T | Observable<T>;
export declare type MonoOp$<I, O> = MonoOp<$<I>, Observable<O>>;
export declare type Op$<I1, I2, O> = Op<$<I1>, $<I2>, Observable<O>>;
export declare type TriOp$<I1, I2, I3, O> = TriOp<$<I1>, $<I2>, $<I3>, Observable<O>>;
export declare type QuadOp$<I1, I2, I3, I4, O> = QuadOp<$<I1>, $<I2>, $<I3>, $<I4>, Observable<O>>;
export declare type Func$<I, O> = Func<$<I>, Observable<O>>;
export declare function normalize<T>(t: $<T>): Observable<T>;
export declare function E<I, O>(f: MonoOp<I, O>): MonoOp$<I, O>;
export declare function E<I1, I2, O>(f: Op<I1, I2, O>): Op$<I1, I2, O>;
export declare function E<I1, I2, I3, O>(f: TriOp<I1, I2, I3, O>): TriOp$<I1, I2, I3, O>;
export declare function E<I1, I2, I3, I4, O>(f: QuadOp<I1, I2, I3, I4, O>): QuadOp$<I1, I2, I3, I4, O>;
export declare function E<I, O>(f: Func<I, O>): Func$<I, O>;